The first line of defense involves which structure(s)?
O T-cells
O skin
O blood
O B-cells

Body temperature is tightly regulated in mammals for example when external temperatures drop too much the body of a mammal responds by in order to its core temperature?

Brainliest ! which would require more force to move or slow down between a bowling ball and a soccer ball? explain why?

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?